But JaJuan Johnson isn't ready to play meaningful minutes in big games for the Celtics, according to coach Doc Rivers. "Not yet," said Rivers. "I think he's getting close. You've got to execute when you're on the floor. That's an area he has to improve on. He's talented, but there's a level to me of intensity that you have to play with every night, and focus. And he's inconsistent. But he's getting there, and he's a great kid, and he will be there."